Illustrate a man on a small boat floating peacefully on a calm river. The man should be seated or standing in the boat, wearing casual or outdoor clothing, with a relaxed or contemplative expression. The river should be wide and tranquil, surrounded by natural scenery like trees, rocks, or gentle hills. The water should reflect the surroundings, with subtle ripples created by the movement of the boat. The overall scene should feel serene and picturesque, with soft lighting to enhance the peaceful atmosphere.